Full-text search, full-text search engine

Full-text search, full-text search engine

I recently used the full-text search function. Here I will give a brief introduction to this function.

What is full-text search? The effect is as follows:

 

Enter any Chinese character or phrase in the search box, and the system will automatically search for information containing this word or phrase in a specific database.

My implementation process is to make this function into a separate control, use to directly reference this control, then assign a value to the data source, and rewrite the data verification method.

The implementation code is as follows:

<Span style = "white-space: pre"> </span> protected override void AutoCompleteExtender_GetDataSource (string sPrefix, int iCount, object context, ref IEnumerable result) {if (GetDataSource! = Null) {var dataSource = GetDataSource (sPrefix, context); if (dataSource! = Null) {var typeName = ""; foreach (var data in dataSource) {typeName = data. getType (). assemblyQualifiedName; break;} result = new object [] {dataSource, typeName };}} protected override string SaveClientState () {string result = string. empty; if (this. selectedData! = Null) {result = JSONSerializerExecute. SerializeWithType (this. SelectedData);} return result;} protected override void LoadClientState (string clientState) {if (! String. isNullOrEmpty (clientState) {IList state = JSONSerializerExecute. deserialize <IList> (clientState); this. selectedData = state ;}/// <summary> /// return from the client, verify the input content /// </summary> /// <param name = "chkString"> use the information passed in by this parameter for data verification </param> /// <param name = "context"> context set by the user </param> [ScriptControlMethod] public virtual object [] CheckInput (string chkString, object context) {if (ValidateInput! = Null) {var data = ValidateInput (chkString, context); if (data. count> 0) {object [] result = new object [] {data, data [0]. getType (). assemblyQualifiedName}; return result ;}} return null ;}

Page javascript

// Call this operation after the backend verification is successful. If one result is returned, the SPAN is directly created and displayed. If multiple results are returned, the dialog box _ onValidateInvokeComplete is displayed: function (result) {this. _ setInvokingStatus (false); if (this. _ autoCompleteControl) {this. _ autoCompleteControl. set_isInvoking (false);} var obj = null; if (result & result. length = 2) {var data = result [0]; var dataType = result [1]; if (data. length> 1) // more than one {for (var I = 0; I <data. length; I ++) {data [I]. _ type = dataType ;} Var sFeature = "dialogWidth: 500px; dialogHeight: 300px; center: yes; help: no; resizable: yes; scroll: no; status: no"; data. nameTable = $ NT; data. keyName = this. get_dataKeyName (); data. displayPropName = this. get_dataDisplayPropName (); data. descriptionPropName = this. get_dataDescriptionPropName (); var resultStr = window. showModalDialog (this. get_selectObjectDialogUrl (), data, sFeature); obj = data [resultStr];} el Se {obj = data [0]; obj. _ type = dataType ;}} if (obj! = Null) {this. _ tmpText = ""; if (this. _ multiSelect = false) {this. set_selectedData (new Array ();} if (this. _ allowSelectDuplicateObj |! This. _ checkDataInList (obj) Array. add (this. get_selectedData (), obj); this. yydatachanged ();} this. setInputAreaText () ;}, loadClientState: function (value) {if (value & value! = "") {Var state = Sys. Serialization. JavaScriptSerializer. deserialize (value); if (state! = Null & state. length) {this. set_selectedData (state) ;}}, saveClientState: function () {var state = ""; var data = this. get_selectedData (); for (var I = 0; I <data. length; I ++) {data [I]. _ dataType = undefined;} if (data) {state = Sys. serialization. javaScriptSerializer. serialize (data);} return state;}, dataBind: function () {this. setInputAreaText () ;}, add_checkDataMask: function (handler) {this. get_events (). addHandler ("onCheckDataMask", handler) ;}, remove_checkDataMask: function (handler) {this. get_events (). removeHandler ("onCheckDataMask", handler );}}

Data Verification

protected IEnumerable CommonAutoCompleteWithSelectorControl1_GetDataSource(string chkstring, object context)        {            IEnumerable result = null;            if (chkstring.IsNotWhiteSpace())                result = OtherFieldData.SearchKeyPointInfoByCnName(chkstring);            return result;        }        protected IList CommonAutoCompleteWithSelectorControl1_ValidateInput(string chkstring, object context)        {            IList result = null;            if (chkstring.IsNotWhiteSpace())                result = OtherFieldData.SearchKeyPointInfoByCnName(chkstring);            return result;        }

The data display function is extracted as a public part and encapsulated to enable data source binding and data verification for control reuse.